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関連する概念動画

DNA Base Pairing02:27

DNA Base Pairing

Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying DNA...
Homologous Recombination02:31

Homologous Recombination

The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
Conservative Site-specific Recombination and Phase Variation02:53

Conservative Site-specific Recombination and Phase Variation

Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
Base-pairing and DNA Repair02:27

Base-pairing and DNA Repair

Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
Homologous Recombination02:31

Homologous Recombination

The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...

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関連する実験動画

Updated: May 8, 2026

Analyzing and Building Nucleic Acid Structures with 3DNA
16:24

Analyzing and Building Nucleic Acid Structures with 3DNA

Published on: April 26, 2013

インテグロン再結合における広範なDNA特異性の構造的基礎

Douglas MacDonald1, Gaëlle Demarre, Marie Bouvier

  • 1Laboratoire de Biochimie et Biophysique des Macromolécules, Département de Biologie Structurale et Chimie, CNRS URA 2171, Institut Pasteur, 75724 Paris Cedex 15, France.

Nature
|April 28, 2006
PubMed
まとめ

インテグロン・インテグラーゼは,配列ではなく,DNA構造を認識することによって,細菌のDNA転送を促進します. このメカニズムは,耐性遺伝子のような遺伝物質を交換することによって,細菌がどのように適応するかを説明します.

科学分野:

  • 分子生物学は分子生物学である.
  • 遺伝学 遺伝学とは
  • 微生物学 微生物学とは

背景:

  • 横向DNA転送は,細菌の進化と適応に不可欠です.
  • インテグロン・インテグラーゼは,移動性遺伝子カセットのattIとattCサイト間のDNA再結合を媒介する.
  • AttCサイトにはシーケンスの保存が欠如しており,構造的認識メカニズムがあることを示唆しています.

研究 の 目的:

  • attC DNAのインテグロン・インテグラーゼ認識の構造的基礎を解明する.
  • 細菌が外来遺伝物質を認識し,組み込む方法を理解する.

主な方法:

  • attC基板に結合したインテグロンインテグラーゼの結晶構造の決定.
  • DNAとタンパク質の相互作用と再結合の構造的決定因子の分析.

主要な成果:

  • インテグラーゼは,構造的特徴,特に2つの裏打ちされたベースを通してattCサイトを認識します.
  • DNAのターゲットサイト認識とアセンブリは,正規のDNA配列とは独立しています.
  • attCにおける不完全な二重対称性は,ベースフリッピングと認識につながります.

結論:

さらに関連する動画

DamID-seq: Genome-wide Mapping of Protein-DNA Interactions by High Throughput Sequencing of Adenine-methylated DNA Fragments
09:14

DamID-seq: Genome-wide Mapping of Protein-DNA Interactions by High Throughput Sequencing of Adenine-methylated DNA Fragments

Published on: January 28, 2016

Deciphering Molecular Mechanism of Histone Assembly by DNA Curtain Technique
06:32

Deciphering Molecular Mechanism of Histone Assembly by DNA Curtain Technique

Published on: March 9, 2022

関連する実験動画

Last Updated: May 8, 2026

Analyzing and Building Nucleic Acid Structures with 3DNA
16:24

Analyzing and Building Nucleic Acid Structures with 3DNA

Published on: April 26, 2013

DamID-seq: Genome-wide Mapping of Protein-DNA Interactions by High Throughput Sequencing of Adenine-methylated DNA Fragments
09:14

DamID-seq: Genome-wide Mapping of Protein-DNA Interactions by High Throughput Sequencing of Adenine-methylated DNA Fragments

Published on: January 28, 2016

Deciphering Molecular Mechanism of Histone Assembly by DNA Curtain Technique
06:32

Deciphering Molecular Mechanism of Histone Assembly by DNA Curtain Technique

Published on: March 9, 2022

  • バクテリアの配列変性DNA認識のための新しいメカニズムが提案されています.
  • この構造的認識メカニズムは,移動性遺伝子要素の交換を容易にし,細菌の適応と進化に影響を与えます.